Francis eourk



(No Model.)

F. ROURK.

MECHANISM FOR CONVERTING MOTION. No. 397,520. Patented Feb 12', 1889.

v Fig.1. I F1 2.

WITNESSES INVENTUFQ N Firms, Pholu-Lilhngmphcr, Washingmn. ay 1:.

UNITED STATES PATENT OFFICE.

FRANCIS ROURK, OF LONDON, ONTARIO, CANADA.

MECHANISM FOR CONVERTING MOTION.

SPECIFICATION forming part of Letters Patent No. 397,520, dated February12, 1889. Application filed January 13, 1888. SeriaINo. 260,649 (Nomodel.)

To aZZ whom it may concern.-

Be it known that I, FRANCIS ROURK,M. 1)., a subject of the Queen ofGreat Britain, residing at London, in the county of Middlesex andProvince of Ontario, Dominion of Canada, have invented certain new anduseful Improvements in Mechanism for Converting Motion; and I do herebydeclare that the following is a full, clear, and exactdeseription of thesame.

My invention relates to mechanism for imparting rotary mot-ion from areciprocating part such as the piston-rod of a steam-cylinder; and itconsists in the combination of devices hereinafter described andclaimed.

The accompanying drawings clearly illustrate my invention, Figure 1being an elevation or face view of my improved mechanism for convertingmotion; Fig. 2, a side view of the same, and Fig. 3 a detail of clutch.

A is the steam-cylinder, and I3 the pistonrod, both of ordinaryconstruction.

0 D are two spur-wheelsrevolving on short shafts F, having bearings atany suitable point, as in frame E. Between these spurwheels and engagingtherewith is a pinion, G, which communicates motion to the main shaftI-I, usually being keyed to the end of said shaft. Rotary motion isimparted to the pinion by the spur-wheels, which are operated by arms IJ, separately pivoted freely to the centers of the spur-wheels O I), andhaving their farther ends received in socket Q on the piston B, so as toparticipate in its upward and downward motion. Friction-clntches (markedK L M N, Fig. 1) or any other suitable device will be attached to thearms so as to bear upon rims O P, formed on the faces of thespur-wheels, the result being that as the arms rise and fall with themotion of the pistonrod from the point 0 to (Z the clutches or otherhearings on the arms bite alternately against the rims on spur-wheels,causing the latter to revolve in the same direction, and imparting anopposite rotary motion to the pinion G on the shaft II. Thus whenfriction-clutches of the shape shown more particularly in Fig. 3 areemployed the eccentricity of their edges or faces being in. the line ofmotion will cause them to bite on the rim, of wheel O when the arm I isdescending, while the clutches on the opposite arm, .I, will move freelywithout biting against the rim of wheel D. When the piston-rod rises,the action of the two sets of clutches is reversed, the pair on arm .Ibiting, while the pair 011 arm I are free, and the same alternate actionapplies to whatever device may be used for imparting motion to thespur-wheels.

It will be seen that the movement of the clutches or other devices onarms I J in each case extends onlyover an arc of the circles of thewheels O I), (as shown by the dotted lines and arrows on the outside ofthose wheels.) This are covers the area of frcest movement, and in nocase does it pass the dead points or centers at top and bottom, and thusall loss of power or risk of stopping on a center is prevented.

To allow of reversing the motion of the engine, a second eylimler willbe provided having amiaratus attached thereto wherein the action is thereverse of the other one.

I do not claim the clutches as new in themselves, bnt select them asmeans of illustrating one of the methods I use for in'ipnrting motion tothe spur-wheels.

Having thus described my invention, what I claim as new is TheCOlllllllliLlllOll,Wltl] a piston, a shaft, and a pinion thereon, ofspur-wheels engaging said pinion on opposite sides, armsconnected to thepiston-I'M and pivoted to the spurwheel centers, and. devices carried bysaid arms to engage and partially rotate each spurwheel alternately,substantially as described.

FRANCIS ROURK. [L. s] \Vitnesses:

HENRY BEECH, B. O. McOANN.

